DOUGS HEADERS D300Y Doug's Headers D300Y Tri-Y Full-Length Headers for Small Block Chevy Trucks and SUVs

Upgrade the exhaust performance of your classic Chevrolet or GMC truck with Doug's Headers D300Y Tri-Y full-length headers. Designed for Small Block Chevy applications, this matched pair fits GM full-size trucks and SUVs from 1973 through 1991. The Tri-Y configuration helps improve exhaust flow and supports stronger engine performance while maintaining a practical design for truck and SUV installations. A durable silver ceramic coating provides an attractive finish and helps manage underhood heat.
The D300Y headers are manufactured from steel for dependable service in demanding street, towing, and performance applications. The stepped primary tube design transitions from 1.625-inch to 2-inch tubing and feeds into 2.5-inch collectors, providing a balanced combination of exhaust velocity and flow capacity. Full-length construction supports efficient exhaust scavenging, while the Tri-Y layout is engineered to help improve torque and drivability across the usable RPM range.
This Doug's Headers package includes the components needed to simplify installation, including gaskets, mounting hardware, and reducers. The silver ceramic finish offers enhanced resistance to corrosion and helps protect the headers from elevated exhaust temperatures. Before ordering, verify the vehicle year, engine configuration, cylinder head compatibility, and available chassis clearance to ensure the D300Y headers are appropriate for your application. Sold as a pair for a complete left- and right-side installation.

Features:

• Full-length Tri-Y header design supports improved exhaust flow and engine performance

• Designed for Small Block Chevy engines in 1973-1991 GM full-size trucks and SUVs

• Steel construction provides dependable strength for street, towing, and performance use

• Silver ceramic coating helps manage underhood heat and resist corrosion

• Stepped primary tubes and 2.5-inch collectors provide a balanced flow design

• Includes gaskets, mounting hardware, and reducers for installation convenience

• Sold as a matched pair for complete vehicle installation